tree:   git://anongit.freedesktop.org/drm/drm-intel drm-intel-gt-next
head:   13c2ceb6addb6b14468e09b75832c98909eed8e7
commit: d53ec322dc7de32a59bf1c2a56b93e90fc2f1c28 [7/8] drm/i915/ttm: switch over to ttm_buddy_man
config: x86_64-rhel-8.3-kselftests (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        git remote add drm-drm-intel git://anongit.freedesktop.org/drm/drm-intel
        git fetch --no-tags drm-drm-intel drm-intel-gt-next
        git checkout d53ec322dc7de32a59bf1c2a56b93e90fc2f1c28
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/i915/intel_region_ttm.c:181:6: warning: no previous prototype for 'intel_region_ttm_node_free' [-Wmissing-prototypes]
     181 | void intel_region_ttm_node_free(struct intel_memory_region *mem,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/intel_region_ttm_node_free +181 drivers/gpu/drm/i915/intel_region_ttm.c

   180	
 > 181	void intel_region_ttm_node_free(struct intel_memory_region *mem,
   182					struct ttm_resource *res)
   183	{
   184		struct ttm_resource_manager *man = mem->region_private;
   185	
   186		man->func->free(man, res);
   187	}
   188	

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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org